Display device

Abstract

A display device includes a display element layer on a substrate. The display element layer includes an anode electrode, a cathode electrode, an overcoat pattern, a light emitting element including first and second element electrodes, an anode transparent electrode electrically connecting the first and second element electrodes to each other, and a cathode transparent electrode that electrically connects the second element electrode and the cathode electrode to each other. The cathode transparent electrode includes a line electrode extending in a second direction intersecting a first direction, and a branch electrode extending in the first direction from the line electrode. The first and second element electrodes are spaced apart from each other at a first distance in the first direction, and the anode transparent electrode and the branch electrode are spaced apart from each other at a second distance greater than or equal to the first distance in the first direction.

What is claimed is: 
     
         1 . A display device, comprising:
 a display element layer disposed on a substrate, the display element layer including:
 an anode electrode and a cathode electrode, disposed on the substrate and spaced apart from each other in a first direction; 
 an overcoat pattern partially covering the anode electrode and the cathode electrode; 
 a light emitting element disposed on the overcoat pattern, the light emitting element including a first element electrode and a second element electrode, the first element electrode and the second element electrode being adjacent to the anode electrode and the cathode electrode, respectively; 
 an anode transparent electrode disposed on the overcoat pattern to electrically connect the first element electrode and the anode electrode to each other; and 
 a cathode transparent electrode disposed on the overcoat pattern to electrically connect the second element electrode and the cathode electrode to each other, wherein 
   the cathode transparent electrode includes:
 a line electrode extending in a second direction intersecting the first direction; and 
 a branch electrode extending in the first direction from the line electrode, 
   the first element electrode and the second element electrode are spaced apart from each other at a first distance in the first direction, and   the anode transparent electrode and the branch electrode are spaced apart from each other at a second distance greater than or equal to the first distance in the first direction.   
     
     
         2 . The display device of  claim 1 , wherein
 the branch electrode overlaps the overcoat pattern in plan view, and   the line electrode does not overlap the overcoat pattern in plan view.   
     
     
         3 . The display device of  claim 2 , wherein
 a circumference of the overcoat pattern includes:
 a first edge overlapping the anode transparent electrode in plan view; 
 a second edge overlapping the branch electrode in plan view; 
 a third edge extending between the first edge and the second edge; and 
 a fourth edge extending between the first edge and the second edge, the fourth edge being opposite to the third edge, and 
   at least one of the third edge and the fourth edge has a length longer than the first distance.   
     
     
         4 . The display device of  claim 3 , wherein the display element layer further includes a residue pattern disposed adjacent to at least one of the third edge and the fourth edge. 
     
     
         5 . The display device of  claim 4 , wherein the residue pattern has a length longer than the first distance. 
     
     
         6 . The display device of  claim 1 , wherein
 the overcoat pattern includes a first portion, a second portion, and a third portion, which are sequentially disposed in the second direction,   each of the first to third portions extends in the first direction to overlap the anode electrode and the cathode electrode in plan view, the first portion overlaps the anode transparent electrode in plan view without overlapping the branch electrode in plan view,   the second portion overlaps both the branch electrode and the anode transparent electrode in plan view, and   the third portion overlaps the branch electrode in plan view without overlapping the anode transparent electrode in plan view.   
     
     
         7 . The display device of  claim 1 , wherein
 the first element electrode and the second element electrode are spaced apart from each other in the first direction,   the anode transparent electrode overlaps at least a portion of the first element electrode in plan view, and   the cathode transparent electrode overlaps at least a portion of the second element electrode in plan view.   
     
     
         8 . The display device of  claim 1 , wherein the anode transparent electrode overlaps about ⅓ or more of an area of the first element electrode in plan view. 
     
     
         9 . The display device of  claim 1 , wherein
 the anode electrode has a first width in the second direction,   the anode transparent electrode has a second width in the second direction, and   the second width is narrower than the first width.   
     
     
         10 . The display device of  claim 1 , wherein
 the anode transparent electrode includes a first portion and a second portion,   the first portion extends in the first direction, and   the second portion extends in a diagonal direction intersecting the first and second directions from the first portion to overlap at least a portion of the first element electrode.   
     
     
         11 . The display device of  claim 1 , wherein the cathode transparent electrode overlaps about ⅓ or more of an area of the second element electrode in plan view. 
     
     
         12 . The display device of  claim 1 , wherein the line electrode is spaced apart from the overcoat pattern in the first direction. 
     
     
         13 . The display device of  claim 1 , wherein
 the branch electrode includes a first portion and a second portion,   the first portion extends in the first direction, and   the second portion extends in a diagonal direction intersecting the first and second directions from the first portion to overlap at least a portion of the second element electrode.   
     
     
         14 . The display device of  claim 1 , wherein
 the anode transparent electrode and the cathode transparent electrode are disposed in a same layer, and   the anode transparent electrode and the cathode transparent electrode include a same transparent conductive material.   
     
     
         15 . A display device, comprising:
 a display element layer disposed on a substrate, the display element layer including:
 anode electrodes disposed on the substrate; 
 a cathode electrode disposed on the substrate, the cathode electrode being spaced apart from the anode electrodes in a first direction; 
 overcoat patterns partially covering the anode electrodes and the cathode electrode; 
 light emitting elements disposed on the overcoat patterns, the light emitting elements each including a first element electrode and a second element electrode; 
 anode transparent electrodes disposed on the overcoat patterns to electrically connect the first element electrodes of the light emitting elements to the anode electrodes; and 
 a cathode transparent electrode disposed on the overcoat patterns to electrically connect the second element electrodes of the light emitting elements to the cathode electrode, wherein 
   the cathode transparent electrode includes:
 a line electrode extending in a second direction intersecting the first direction; and 
 branch electrodes extending in the first direction from the line electrode, 
   the first element electrode and the second element electrode of any one of the light emitting elements are spaced apart from each other at a first distance in the first direction, and   any one of the anode transparent electrodes and any one of the branch electrodes are spaced apart from each other at a second distance greater than or equal to the first distance in the first direction.   
     
     
         16 . The display device of  claim 15 , wherein
 the light emitting elements include a first light emitting element and a second light emitting element,   the anode electrodes include a first anode electrode and a second anode electrode,   the anode transparent electrodes include a first anode transparent electrode electrically connecting the first element electrode of the first light emitting element to the first anode electrode and a second anode transparent electrode electrically connecting the first element electrode of the second light emitting element to the second anode electrode,   the first anode transparent electrode and the second anode transparent electrode are spaced apart from each other at a third distance in the second direction, and   the first anode electrode and the second anode electrode are spaced apart from each other at a fourth distance smaller than the third distance in the second direction.   
     
     
         17 . The display device of  claim 16 , wherein
 each of the first element electrodes of the first and second light emitting elements has a first width in the second direction, and   the third distance is smaller than or equal to a sum of about a half of the first width and the fourth distance.   
     
     
         18 . The display device of  claim 15 , wherein
 the branch electrodes overlap the overcoat patterns in plan view, and   the line electrode does not overlap the overcoat patterns in plan view.   
     
     
         19 . The display device of  claim 18 , wherein
 a circumference of any one of the overcoat patterns includes:
 a first edge overlapping a corresponding one of the anode transparent electrodes in plan view; 
 a second edge overlapping a corresponding one of the branch electrodes in plan view; 
 a third edge extending between the first edge and the second edge; and 
 a fourth edge extending between the first edge and the second edge, the fourth edge being opposite to the third edge, and 
   at least one of the third edge and the fourth edge has a length longer than the first distance.   
     
     
         20 . The display device of  claim 19 , wherein the display element layer further includes a residue pattern disposed adjacent to at least one of the third edge and the fourth edge of the any one of the overcoat patterns.